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Finding the Fourth Proportional to 639,194.88, 959,220 and 265,217.88

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Solution

The fourth proportional to 639,194.88, 959,220 and 265,217.88 is: 398,004.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,194.88 : 959,220 = 265,217.88 : x
  2. Step 2: Convert to fraction form
    639,194.88/959,220 = 265,217.88/x
  3. Step 3: Cross multiply
    639,194.88x = 959,220 × 265,217.88
  4. Step 4: Simplify right side
    639,194.88x = 254,402,294,853.60
  5. Step 5: Solve for x
    x = 254,402,294,853.60/639,194.88
  6. Step 6: Final answer
    x = 398,004.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.